Electric fumigator.



W. F. MoNABB. ELECTRIC ,FUMIGATOR. APYLIOATIOH rum) 111 311, 1914.

1,102,424. Patented July 7, 1914.

' FIG-.2

THE NORRIS PETERS CO PHOTOLITHO.. WASHINGTON. D. C.

UNITED STATES PATENT ornion.

WILLIAM F. McNABB, or PITTSBURGH, rEN NsYLvAnm.

ELECTRIC FUMiGA'roR.

To allavhomtmay concern:

Be it known that I, WILLIAM F. MONABB, a resident of Pittsburgh-,- in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Electric Fumigators, of which the following is a specification.

This invention relates to fumigators' 'or disinfecto'rs.

The object of the invention-is to provide a simple, safe and convenient device for yaporizing volatile disinfecting or fumigating v. .1... substances, one 'WhlChflS easy and inerrperw sive to manufacturef ona which evap'o rate all of the fumigat-ing substance,--thereby giving uniform results and eflicien'cy of *fu-" migatiomand one which can be provided with means for indicating the conclusion of the operatioh 9S6 anaemia- 11 mm; a

closed chamber the operato'ris advised-' when the disinfecting or fumigating operatio'n isconcluded. 5 i

' The invention comprises-the 'constructio'p and arrangement of parts-hereinafterfde:

scribed and claimed. i

In the drawings, Figure 1 represents a sectional elevation of "one 'embodiment of the invention, and Fig. 2 is a diagrammatic view showing the circuit arrangemenfland iii- F indicating means. 1"

Referring to the drawings, the device comprises'a receptacle 1 which may be of any suitable form and is shown asan ordinary tin can provided with a cap or cover 2. In said receptacle is an electrical heater comprising an outer cup shaped member 4 closely fitting within the receptacle',;and an inner cylindrical portion 5, which is separated from the rim of the outer member 4- by anannular space 6 andwhich forms a support for an electric heating elem'eiit 'f, consisting of a number of coils or turns of fusible wire, such as ordinary German silver wire, which are wound on said support out of contact with each other so that they cannot short circuit. Connected to the opposite ends of the coils 7 are two leads 8, of copper wire, which may pass directly through the walls of the receptacle, but are shown as extending up over the edges thereof, and which are preferably wrapped with suitable insulating material 9, so that the heating element is not short circuited through the metallic receptacle. Said leads are connected by suitable wires to two contacts 10 of a suitable switch board 11, on which is an or- I v "Specification of Letters Patent; I, Patented July '7', 1914, Application filed April 1, 1914. Serial N o. 828,828.

diiiary double pole switch 12 for connecting the'idevice to' a suitable outside course of current; such as a battery or an electric In the circuit is located an In manufacturing the fumigatorjthe inner cylin drical member 5-is molded from i plaster of Paris or other suitable insulating .material', and has embedded therein a number of hooks or-projections 14, and theheating element7'is wound upon the cylindrical 1 surface of said' members The cup sha-ped {ni'ember-Ais'then molded from plaster of Paris or other' insulating substances, being formed either the receptacle 1,' oroutside of said receptacle, and then placed therein,

j andbeforeiit fullyhardens the cylindrical member 5 carrying the heating element? is pressed down to its seat, so that the'hooks 1 or-projections M are embedded in the soft member 4, so thatavhen the latter solidifies, 'the'heating element is rigidly attached to g the recept'a'cle'and is maintained in spaced relation from the wall of the con'tainer' lj The fumigating" or disinfecting material,

such as formaldehyde, paraformaldehyde'or other volatile liquid, is then'poured into the receptacle 1, and flowsfdown into the space 6, around the heating element 7 as indicated at 15, and hardens or crystallizes thereon. The' upper surface, of the volatile substance is then covered with a thin layer 16 of suitable material, such as paraffin or the like, which hardens and forms a protective covering for the material and prevents it from evaporating. Fumigating devices manufactured in this manner may be-sold in the market as articles of manufacture and may .be carried in stock for any suitable length of time 'untilused v For fumigating and disinfecting a room, the receptacle with the heating element and fumigating or disinfecting material therein is placed in the room and the wires 8 are led to the outside of the room and connected up to the switch board 11, which is connected to a suitable source of current. The room is then sealed and the switch 12 closed, it being understood that the cover 2 is either perforated or has been removed from the receptacle. Current flows through the circuit and lights up the lamp 13 indicating that the operation is proceeding. In passing through the resistance coils 7 the current generates heat which is communicated to the volatile material in which the wires are imdisinfecting operation is concluded.

mersed and from said ma nate the pro' tecting coating 16 Which meltsandallows the vapors or fumes to be given oil into the room. As the operation proceeds andathefumigating material is volatilized the "level of liquid lowers .until finally the wires? are exposed andcannotthen give up'their heat directly to the liquid. Cons'equian'tly, 'said Wires become incandescent and when sufiiciently; exposed, finally tuse'lr -Dlii's breaks the Z circuit and puts out .-the Iamp 13% which Findicates to the operatorthatmhe flimigating -or able tim'e in; fumigation, gas itg-ives a {visible indicatiojuof the conclusion 0i theiumigat ing operation, 1 It also ayoidsg' the liability oi conflagration -;as';- the heat producedewithz ou me n ther i 1.0 i b ity c ns'i ion i g m ated; (to-surrou ding a ticle P t wi leyap ate 0fthe fumigating materi :11; thus giving; uni; f0rm-;results and.eificiency,;=

What I, claim is I l. A fumigator, comprisinga receptacle provided with-a heatingelement .adapted to be mmer in rtumigating subst ncea m taine d- 1n said receptacle; saidgheating; elementbeinglformcd; qf'fusible material ,and

adapted when exposed to,,fuse and-break the element simmersed in said i material and A fumigator, comprising 2 containing v volatile mater al and. provided formed of fusible material, said element be ing adapted; to fuse and break the circuit \vhenexposed above the level of saidfmaterial: I

with a fusible heating element, a .circuit leading from said element to a source 0t current, and an indicating :lamp circuit; 1

7 4. A fumigator, comprising a receptacle provided with a support, a heating element carried bysaid'supporha circuit leading from said heating element to a source of cur- 4 rent; andv'olatile material contained in said receptacle and in which said heating element 'isfinnner'sed, said element being adapted to fu'seivvhen"flie -level of the volatile material "lowers to expose the same.

5. A fumigator,--comprising a receptacle f provided: with; a; support; a heating element rried-by saidfsupport, a' circuit leading rom' said heating element to a source of ourrent, volatile material contained in said receptacle and in which'said heating element is imvmersed, said element being adapted to fuse =4: 'when 'the leve'l of the volatile material lowers to expose the same, and an indicating .larnp -in saidgcircuit. f 6.fu1 ni gator, ,comprising a receptacle, ,a ,-'suppprt;' therein,+a w-ire heating element icQilqgdZaaround said support-and having. teriminals extending-to the outside of said receptacle, and,-volatile fumigating material in jsaidgreceptacle and in which said heating element 1 is-immersed, said heatingv element beingadapted to fuse-when the level of liquid lowers and-exposes the same.

.a support --,therein, a wire heating element coiled around said support and having terminals xtending tothe outsideof said ref ceptacle,,andyolatilefumigating material in sald receptacle and in which said heating element is immersed, said heating element 5 being adapted to .fu'se when the level of liq uidlowers and exposes the same, and a layer ofsolid material covering said volatile material and which is adapted to melt when the a heating element is acted.

In testimony whereof, I have hereunto set Zmy ni.

WILLIAM F. MoNABB.

F Witnesses:

. ELBERT L. HYDE,

7 WILLIAM B. WHARTON.

Copies of this patent may be bbtaincd lorfive cents each, by addressing the Commissioner of Patents,

- Washington; D; C.-

7. Ar fumigator, comprising a receptacle, 1 

